<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/vue/2.6.9/vue.js"></script>
</head>
<body>
<div id="app">
    <span v-text="hello + '--- ' + title"></span>
</div>
<script>
    let vm = new Vue({
        el: "#app",
        data: {
            hello: "hello world",
            title: "",
        },
        created: function () {
            this.title = {{.title}}
        }
    })
</script>
</body>
</html>